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WI-LSC905/3003-02
LSC Light Sequence Commander Testing Procedure
The following information can be used for diagnostic evaluation and testing:
1. Overcrank:
Remove the yellow 16 ga. wire from the starter. Place the power switch to the ON position
and place the Auto/Manual switch to manual. After 5 start attempt cycles of the crank relay, the fuel
and crank relay will remain open and the red alarm LED will flash. The toggle switch must be reset to
OFF to clear the alarm. Reconnect the Yellow wire to the starter for operation after completing this
test.
2. Low Oil Pressure Shutdown Circuit:
Start the engine and ground the tan 16 ga. wire on the oil
pressure switch by removing it from the NC terminal and temporarily attaching it to the NO contact on
the switch, effectively taking the wire to ground. This will cause a shutdown after 3 seconds. All light
relays will open and the green LED will turn OFF. The red alarm LED will be flashing. You must
reconnect the tan wire to the NC terminal and reset the toggle switch to OFF to clear the alarm. (There
will be no sequencing of the lights).
3. High Temperature:
Start the
Engine and ground the wire on the temperature sender. This will cause
a shutdown after 5 seconds. All light relays will open and the green LED will turn OFF. The red alarm
LED will be flashing. You must reset the toggle switch to OFF to clear the alarm. (There will be no
sequencing of the lights).
4. Low Fuel Level:
Start Inhibit
can be checked by removing the wire from the sending unit. The red
alarm LED will be flashing. Place the ON/OFF toggle switch in the ON position. Place the Auto/Manual
switch in the Manual position. The unit will not start. The red alarm LED will continue to flash until the
wire is reattached to the sender and sufficient fuel is in the tank.
5.
Low Fuel Level:
Sequenced shutdown
can be checked by starting the engine and allowing the lights
to turn on. After the lights are on, remove the wire from the Fuel Sender and the unit will begin to
sequence the lights OFF at three-second intervals (2 Lights at a time if the machine has two lights on
each breaker). The red LED will also be flashing. Within 30 seconds from the time the wire is removed,
the engine will stop. The wire must be reattached to the fuel sender to clear the alarm.
6.
Fuel Sending Unit:
Using a wire with a hook bent on one end, simply depress the float in the tank
to below the 10 percent level. This should initiate the shutdown sequence by shutting the lights off
first. The engine should be shut down approximately 30 seconds after the float was depressed. If the
float is depressed and the shutdown does not occur, the fuel sending unit needs to be readjusted or
replaced.
7.
Glow Plug Circuit:
The automatic glow plug control circuit can be set at 3 timed intervals: Maximum 5
seconds, 10 seconds and 60 seconds depending on the engine manufacturer’s requirements. The
control default is set at 10 seconds. For engines which require the shorter 5-second interval, the
yellow wire will be taken to ground on the engine with the rest of the harness ground wires. For
engines that require the maximum 60 sec. on time the violet wire from plug must be grounded. The
glow plug circuit monitors the water temperature to determine the glow plug requirements. When the
engine is cold the glow plug on time will be 5, 10 or 60 seconds as wired. When the engine is hot it
will operate the glow plugs if required.
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Fault Alarm (flashing red LED):
If any of the shutdown circuits have been activated, the red alarm
LED will flash. Fuel level, oil level and water level should be checked. If everything checks out and fuel
is replenished above the 20 percent level, the Auto/Manual switch should be set to the center OFF
position to reset the controller.
Not
for
Reproduction
